JP2020193026A - Dispensing cap for double container and double container - Google Patents

Abstract

To provide a dispensing cap for a double container capable of effectively suppressing noise caused by an air valve, and the double container.SOLUTION: The dispensing cap for the double container of the present invention includes: a cap body 7 having an outside air inlet 7h, an annular wall 7j, and a concave portion 7k and a convex portion 7m adjacent to each other in a circumferential direction on a peripheral surface of the annular wall 7j; and an air valve 6a normally contacting airtightly to a valve seat seal portion 7p to block an air flow between a vent 3c and the outside air inlet 7h, and elastically deforming to become non-contact with the valve seat seal portion 7p when an internal space N is decompressed, in which: the air valve 6a is provided with a ring portion 6k that is slidable with respect to the annular wall 7j; and forms, in a state where being contact with the convex portion 7m when the air valve 6a elastically deforms, a gap g with the recess 7k through which the air flow between the vent 3c and the outside air inlet 7h passes.SELECTED DRAWING: Figure 1

Description

INDUSTRIAL APPLICABILITY The present invention is a double-container pouring cap that is attached to a container body including an inner layer body for accommodating the contents and an outer layer body for accommodating the inner layer body, and ejects the contents as the outer layer body is pressed. , And a double container with this pouring cap attached to the container body.

In recent years, in a container in which a pouring cap is attached to a container body for accommodating contents, for example, as shown in Patent Document 1, a double container (Delami) using a container body composed of an inner layer body and an outer layer body. Containers (also called laminated peeling containers) are used. This type of outer layer is flexible and has through holes (vents) that penetrate the front and back so that air can be taken into the internal space formed between the inner layer and the inner layer. Has been done. The pouring cap is provided with an air valve that prevents air from leaking from the internal space to the outside world, while allowing air to be introduced from the outside world into the internal space when the internal space is decompressed.

According to the double container having such a structure, the internal space is pressurized by pressing the outer layer body, whereby the pressure in the filling space is increased and the contents can be poured out. Further, if the pressure on the outer layer body is released, the internal space is decompressed as the outer layer body is restored, so that air is introduced from the vent to the inner space and only the inner layer body can be reduced in volume and deformed. That is, there is an advantage that the independence of the container is maintained even if the content is reduced. Further, since the contents can be poured out without replacing with the outside air, there is an advantage that the quality of the contained contents is less likely to deteriorate. For this reason, this type of container is being widely used as a suitable container for storing seasonings such as soy sauce, sauce, mirin, and cooking liquor, and cosmetics such as shampoo, conditioner, liquid soap, and lotion.

Japanese Unexamined Patent Publication No. 2011-31932.

As shown in Patent Document 1, the above-mentioned injection cap is provided with an air valve inside the cap body attached to the outer layer body. The cap body is provided with an outside air inlet leading to the vent of the outer layer body, and the air valve normally abuts on the back surface of the cap body to allow air to flow between the vent and the outside air inlet. As a result of elastic deformation so as to separate from the back surface of the cap body when the internal space is decompressed, air can flow between the ventilation port and the outside air introduction port.

By the way, depending on the amount of air introduced into the internal space, the flow velocity, etc., the air valve separated from the back surface of the cap body may vibrate and make a noise.

An object of the present invention is to solve such a problem, and a double container pouring cap and a double container capable of effectively suppressing noise caused by an air valve. The purpose is to provide.

The present invention is mounted on a container body including an inner layer having a filling space for accommodating the contents and an outer layer having a vent that partitions the inner space between the inner layers and leads to the inner space. , A double container pouring cap for pouring out the contents of the filling space from the pouring outlet by pressing the outer layer body.
An outside air introduction port that covers the ventilation port and is attached to the outer layer body and leads to the ventilation port, an annular wall located in a path from the ventilation port to the outside air introduction port, and a circumferential surface portion of the annular wall. A cap body with adjacent recesses and protrusions,
Normally, it airtightly contacts the valve seat seal portion provided on the cap body to block the flow of air between the vent and the outside air introduction port, while elastically deforming when the internal space becomes decompressed. An air valve that is not in contact with the valve seat seal portion is provided.
The air valve is slidable with respect to the annular wall, and when the air valve is elastically deformed, the vent and the outside air are introduced between the air valve and the concave portion in a state of being in contact with the convex portion. A double container pouring cap having a ring portion for partitioning a gap through which air flowing between the mouth and the mouth passes.

The annular wall is a portion provided with the concave portion and the convex portion and a portion that functions as the valve seat seal portion without the concave portion and the convex portion along the direction in which the ring portion slides. Equipped with a non-concave peripheral surface
It is preferable that the ring portion of the air valve normally comes into contact with the non-concavo-convex peripheral surface portion, while the ring portion comes into contact with the convex portion when the air valve is elastically deformed.

The cap body has the valve seat seal portion on the radial outer side or inner side of the annular wall.
The air valve preferably has a valve body seal portion that abuts on the valve seat seal portion on the radial outer side or inner side of the ring portion.

The ring portion preferably has a second convex portion that slidably contacts the convex portion.

It is preferable to have a lubricant at a portion where the annular wall and the ring portion come into contact with each other.

The double container of the present invention is composed of the container body and an injection cap for any of the double containers.

The double container pouring cap and the double container of the present invention are provided with recesses and protrusions adjacent to the peripheral surface of the annular wall provided in the cap body in the circumferential direction, and the air valve is an annular wall. It is provided with a ring portion that can slide with respect to the ring. Here, the ring portion is in contact with the convex portion in a state where the air valve is elastically deformed. As a result, the vibration of the air valve is suppressed, so that the noise can be effectively suppressed. Further, when the ring portion is in contact with the convex portion, a gap through which the air flowing between the ventilation port and the outside air introduction port passes is partitioned between the ring portion and the concave portion. Therefore, the air taken in from the outside air introduction port passes through this gap and is introduced into the internal space, so that the outer layer body can be smoothly restored. In the present specification and the like, the contact includes not only a state in which the two members are in contact but also a state in which the two members are slightly separated from each other.

It is a partially enlarged sectional view which showed the 1st Embodiment of the double container according to this invention. FIG. 5 is a partially enlarged cross-sectional view showing a state in which the air valve is elastically deformed downward in the double container in FIG. 1. It is a partially enlarged sectional view which showed the 2nd Embodiment of the double container according to this invention. FIG. 3 is a partially enlarged cross-sectional view showing a state in which the air valve is elastically deformed downward in the double container in FIG.

Hereinafter, the first embodiment of the double container according to the present invention will be described with reference to FIGS. 1 and 2. In the present specification and the like, the "up" direction and the "down" direction are states in which the outer layer body (reference numeral 3) is located below and the lid body (reference numeral 8) is located above as shown in FIG. The direction in. Further, in the following description, the double container pouring cap will be simply referred to as a pouring cap.

The double container of the present embodiment includes a container body 1 (composed of an inner layer 2 and an outer layer 3), a pouring cap 4 (composed of an inner plug 5, a check valve 6, and a cap body 7), and a cap body 7. A lid 8 is provided.

The inner layer 2 is provided with a filling space S inside which the contents can be accommodated. The inner layer 2 of the present embodiment is made of a thin synthetic resin and can be deformed in a reduced volume.

The outer layer body 3 includes a tubular mouth portion 3a extending in the vertical direction. A male screw portion 3b is provided on the outer peripheral surface of the mouth portion 3a. Further, the mouth portion 3a is provided with a vent 3c extending in the radial direction and penetrating the mouth portion 3a, and a male screw portion 3b extending in the vertical direction is provided on the outer peripheral surface where the vent 3c opens. A notch 3d for dividing is provided. Although not shown, a tubular body portion and a bottom portion for closing the lower end of the body portion are provided below the mouth portion 3a, and the outer layer body 3 has a bottle-like shape. Further, the outer layer body 3 of the present embodiment is made of synthetic resin, and the body portion has flexibility.

Further, an internal space N leading to the vent 3c is formed between the inner layer 2 and the outer layer 3.

The inner layer body 2 and the outer layer body 3 in the present embodiment are formed by laminating synthetic resins having low compatibility with each other so as to be peelable. Examples of the synthetic resin constituting the inner layer 2 include nylon resin (PA), ethylene vinyl alcohol copolymer resin (EVOH), modified polyolefin resin (for example, "Admer" (registered trademark) manufactured by Mitsui Chemicals, Inc.), polyethylene terephthalate, etc. In addition to the resin (PET), a polyethylene resin (PE) or a polypropylene resin (PP) can be used. Examples of the synthetic resin constituting the outer layer 3 include polyethylene resin (PE) such as low density polyethylene (LDPE) and high density polyethylene resin (HDPE), polypropylene resin (PP), and polyethylene terephthalate resin (PET). ) Can be adopted. The inner layer 2 and the outer layer 3 may be formed by a single synthetic resin so as to have a single layer structure, or a plurality of synthetic resins are laminated to form a laminated structure. It may be done. Such an inner layer body 2 and an outer layer body 3 can be obtained by blow molding a parison in which a synthetic resin material forming the inner layer body 2 and a synthetic resin material forming the outer layer body 3 are laminated. In addition, a test tubular preform in which the synthetic resin material of the inner layer 2 and the synthetic resin material of the outer layer 3 are laminated is prepared, and this preform is formed by biaxially stretched blow molding, or the inner layer is formed. It is also possible to use a body in which the body and the outer layer are individually formed, and then the inner layer is arranged inside the outer layer. Further, although not shown, one or a plurality of adhesive bands extending in the vertical direction and partially joining the inner layer 2 and the outer layer 3 between the inner layer 2 and the outer layer 3. May be provided.

The inner plug 5 is provided with a partition wall located above the mouth portion 3a and closes the filling space S. The partition wall of the present embodiment includes a tubular wall 5b having a through hole (communication port 5a for contents) inside, an intermediate wall 5c located on the radial outer side of the tubular wall 5b and open upward, and an intermediate wall. It is composed of a flange wall 5d extending radially outward from 5c. A lower annular wall 5e for liquidally sandwiching the inner layer 2 with the outer layer 3 is provided on the lower surface of the flange wall 5d, and an upper annular wall 5f is provided on the upper surface of the flange wall 5d. There is. Further, the connecting portion between the flange wall 5d and the upper annular wall 5f is provided with a communication opening 5g for passing the inner and outer sides of the upper annular wall 5f in the radial direction.

The check valve 6 has an air valve 6a for regulating the flow of air and an injection valve 6b for regulating the flow of contents. The check valve 6 of the present embodiment is made of a soft material such as rubber, an elastomer, or soft polyethylene (low density polyethylene).

The air valve 6a has a tubular shape and has a base portion 6c whose lower end is supported by an intermediate wall 5c. Further, on the radial outer side of the base portion 6c, a thin donut plate shape is formed, and as shown in FIG. 1, the inner edge portion is integrally connected to the base portion 6c and fixedly supported by the base portion 6c, and the inner edge portion is fixedly supported by the base portion 6c. An air valve body 6d extending so as to incline downward is provided. Such an air valve body 6d can be elastically deformed so that its outer edge moves up and down. Further, a ring portion 6e extending upward is integrally connected to the outer edge portion of the air valve main body 6d, and a convex portion protruding outward in the radial direction on the inner peripheral surface at the upper end of the ring portion 6e. A portion (second convex portion) 6f is provided (see the enlarged view of FIG. 1).

The discharge valve 6b is located above the content communication port 5a, and is seated at the upper end of the tubular wall 5b to close the content communication port 5a with the plate-shaped discharge valve body 6g. It is provided with a connecting piece 6h that elastically connects the valve ejection body 6g and the base portion 6c. The dispensing valve 6b is not limited to connecting the dispensing valve main body 6g and the base 6c with a plurality of connecting pieces 6h such as a 3-point valve or a 4-point valve, and one connecting piece such as a 1-point valve. The dispense valve main body 6g and the base portion 6c may be connected by 6h.

The cap body 7 includes a top wall 7a located above the check valve 6 and an outer peripheral wall 7b that is integrally connected to the outer edge of the top wall 7a and that covers the vent 3c and surrounds the mouth 3a. On the inner peripheral surface of the outer peripheral wall 7b, a female screw portion 7c suitable for the male screw portion 3b is provided.

At the central portion of the top wall 7a, a pouring cylinder 7e is provided which extends upward from the edge of the hole penetrating the top wall 7a and whose upper opening is the pouring outlet 7d of the contents. Further, on the lower surface of the top wall 7a, a support portion 7f for supporting the upper end portion of the base portion 6c is provided on the inner and outer sides in the radial direction.

On the radial outer side of the support portion 7f, a covered tubular bulging portion 7g that rises upward from the top wall 7a is provided. The bulging portion 7g is provided with an outside air introduction port 7h penetrating the upper surface thereof.

Further, on the lower surface of the top wall 7a, an annular wall 7j extending downward is provided on the radial outer side of the bulging portion 7g. As shown in the enlarged view in FIG. 1, the annular wall 7j of the present embodiment has the annular wall 7j in the outer peripheral surface portion located on the outer side in the radial direction from the tip of the annular wall 7j toward the root (from the bottom to the top). It is provided with a recess 7k extending in a groove shape to the middle portion in the vertical direction of the above. As shown in the cross-sectional view taken along the line AA of FIG. 1, the outer peripheral surface portions of the annular wall 7j located on both sides in the circumferential direction with respect to the recess 7k project radially outward with respect to the recess 7k. It becomes. Therefore, in the present specification and the like, the outer peripheral surface portion of the annular wall 7j located on both sides in the circumferential direction with respect to the concave portion 7k is referred to as a convex portion 7m. Further, above the concave portion 7k is a portion where the concave portion 7k or the convex portion 7m is not provided (the portion where the outer peripheral surface portion of the annular wall 7j remains as it is), and in the present specification and the like, this portion is a non-concavo-convex circumference. It is referred to as a surface portion 7p.

Further, on the upper surface of the top wall 7a, a claw portion 7n that bulges outward in the radial direction is provided.

The lid 8 includes a top wall 8a located above the top wall 7a and a lid outer peripheral wall 8b integrally connected to the top wall 8a. On the lower surface of the central portion of the top wall 8a, a seal cylinder 8c that is inserted inside the dispensing cylinder 7e and is in airtight contact with the inner surface of the dispensing cylinder 7e is provided. Further, an engaging wall 8d that engages with the claw portion 7n is provided on the radial outer side of the seal cylinder 8c. A hinge portion 8e that is integrally connected to the outer peripheral wall 7b of the cap body 7 is provided on the outer peripheral surface of the lid outer peripheral wall 8b. Although the lid 8 of the present embodiment is integrally connected to the cap body 7, it may be provided separately from the cap body 7 and detachably attached to the cap body 7 by screws or undercuts. Good.

When such an inner plug 5, a check valve 6, and a cap body 7 are attached to the outer layer body 3, the state as shown in FIG. 1 is normally obtained. In this state, as shown in the enlarged view of FIG. 1, the ring portion 6e is located on the radial outer side of the annular wall 7j, and the second convex portion 6f provided on the ring portion 6e is not the annular wall 7j. It is in airtight contact with the uneven peripheral surface portion 7p. The air valve main body 6d is elastically deformed so as to bend downward when the internal space N is in a reduced pressure state, as will be described later. At this time, the ring portion 6e moves downward with respect to the annular wall 7j, and the second convex portion 6f is formed from the non-concave peripheral surface portion 7p to the concave portion 7k and the convex portion as shown by the virtual line and the solid line in FIG. It slides to the part where the part 7m is provided. That is, when the internal space N is in a reduced pressure state, the second convex portion 6f is in contact with the convex portion 7m, and the cross-sectional view between the second convex portion 6f and the concave portion 7k is shown along BB in FIG. The gap g is partitioned as shown.

Further, when the gap g is partitioned, a passage (communication passage) through which air passes from the outside air introduction port 7h to the ventilation port 3c is formed inside the cap body 7. The communication passage of the present embodiment passes from the outside air introduction port 7h to the inside of the bulging portion 7g, passes through the gap g shown in FIG. 2, passes through the communication opening 5g, and further between the male screw portion 3b and the female screw portion 7c. It is a passage leading to the vent 3c via the spiral gap (or the gap due to the notch 3d) formed in.

In the double container having such a configuration, the internal space N is pressurized by pressing the body portion of the outer layer body 3, thereby increasing the pressure of the filling space S. Therefore, the contents of the filling space S are noteworthy. While raising the valve main body 6g, it flows from the content communication port 5a through the gap around the connecting piece 6h into the inside of the base 6c, and is poured out from the injection port 7d through the inside of the injection cylinder 7e. In the above-mentioned communication passage, when the internal space N is pressurized, the second convex portion 6f is in airtight contact with the non-concavo-convex peripheral surface portion 7p as shown in the enlarged view of FIG. Since it is in the state, the air in the internal space N does not leak from the outside air introduction port 7h.

After that, when the pressure on the body portion of the outer layer body 3 is released, the pressure in the filling space S returns to the original state, and the discharge valve main body 6 g is seated on the upper end portion of the tubular wall 5b, so that the contents can be communicated. It is possible to prevent the inflow of outside air from the mouth 5a into the filling space S. Further, when the body portion of the outer layer body 3 begins to be restored with the release of the pressing, the volume of the internal space N increases, so that the internal space N is in a decompressed state. As a result, the air valve body 6d is elastically deformed so as to bend downward, and the ring portion 6e moves downward with respect to the annular wall 7j, and the above-mentioned gap g is provided between the second convex portion 6f and the concave portion 7k. Is partitioned, so that the air introduced from the outside air introduction port 7h is introduced into the internal space N through the communication passage. As a result, the outer layer 3 can be restored while the inner layer 2 is reduced in volume and deformed. Further, in this state, the second convex portion 6f is in contact with the convex portion 7m, and the vibration of the air valve 6a is suppressed, so that the noise can be effectively suppressed.

By the way, in recent years, for example, in consideration of recyclability, the adoption of polyethylene terephthalate resin (PET) as a material for the inner layer body 2 and the outer layer body 3 has been studied. This material has a higher flexural modulus than low-density polyethylene (LDPE), which is often used in double containers, and has higher rigidity when used for the outer layer body 3. Therefore, when the pressure on the outer layer body 3 is released, the body portion Restores rapidly. That is, when the outer layer body 3 is restored, the flow velocity of the air introduced into the internal space N tends to increase, so that the vibration of the air valve 6a tends to increase. In such a case, for example, by increasing the amount of protrusion of the second convex portion 6f to increase the contact resistance with the convex portion 7m, even if the vibration of the air valve 6a becomes large, the noise is effectively suppressed. Can be done.

Next, a second embodiment of the double container according to the present invention will be described with reference to FIGS. 3 and 4. The parts whose functions and configurations are substantially the same as those of the double container of the first embodiment described above are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

The double container of the present embodiment includes an air valve main body 6j instead of the air valve main body 6d in the check valve 6 described above. As shown in FIG. 3, the air valve main body 6j has an inner edge portion integrally connected to the base portion 6c and fixedly supported by the base portion 6c, and extends outward in the radial direction so as to be curved downward from the base portion 6c. doing. Further, a ring portion 6k extending upward is provided at the tip portion of the air valve main body 6j, and a convex portion (convex portion) protruding inward in the radial direction on the inner peripheral surface at the upper end of the ring portion 6k. Second convex portion) 6 m is provided. A flat valve body seal portion 6n extending along the horizontal direction is provided on the radial outer side of the ring portion 6k, and is oblique downward on the radial outer side of the valve body seal portion 6n. An inclined portion 6p extending to the surface is provided.

The cap body 7 is provided with an annular wall 7q instead of the above-mentioned annular wall 7j. A convex portion 7r extending in the vertical direction from the tip to the root of the annular wall 7q is provided on the outer peripheral surface portion of the annular wall 7q on the outer side in the radial direction. As shown in the cross-sectional view taken along the line CC of FIG. 3, the outer peripheral surface portion of the annular wall 7q located on both sides of the convex portion 7r in the circumferential direction is recessed inward in the radial direction with respect to the convex portion 7r. It becomes. Therefore, in the present specification and the like, the outer peripheral surface portions of the annular wall 7q located on both sides of the convex portion 7r in the circumferential direction are referred to as the concave portion 7s.

Further, the cap body 7 is provided with a valve seat seal portion 7t that protrudes downward on the radial outer side of the annular wall 7q and the protruding lower surface becomes flat.

In the double container of the present embodiment, when the inner plug 5, the check valve 6, and the cap body 7 are attached to the outer layer body 3 as shown in FIG. 3, the reverse is normally performed as shown in the enlarged view of FIG. The second convex portion 6m of the check valve 6 is in contact with the convex portion 7r of the annular wall 7q, and the space between the second convex portion 6m and the concave portion 7s is as shown in the cross-sectional view taken along the CC of FIG. The gap g is partitioned in. In a normal state, the valve body seal portion 6n is in airtight contact with the valve seat seal portion 7t, so that the communication passage connecting the outside air introduction port 7h to the ventilation port 3c is provided by the valve body seal portion 6n and the valve seat seal portion 7t. It is not communicated.

On the other hand, when the internal space N is in a reduced pressure state, the air valve body 6j is elastically deformed so as to bend downward, and the ring portion 6k moves downward with respect to the annular wall 7q. Even in this state, the second convex portion 6m of the check valve 6 is in contact with the convex portion 7r of the annular wall 7q, and a gap g is partitioned between the second convex portion 6m and the concave portion 7s. .. Further, at this time, since the valve body seal portion 6n is separated from the valve seat seal portion 7t as shown by the solid line in FIG. 4, the communication passage is in a state of communicating from the outside air introduction port 7h to the ventilation port 3c.

In the double container having such a configuration, similarly to the above-mentioned double container, when the body portion of the outer layer body 3 is pressed, the internal space N is pressurized and the pressure of the filling space S increases, so that the filling space S has the same structure. The contents flow from the content communication port 5a into the inside of the base 6c through the gap around the connecting piece 6h while raising the pouring valve main body 6g, and pass through the inside of the pouring cylinder 7e to the pouring outlet 7d. Is poured out from. In this state, since the valve body seal portion 6n is in airtight contact with the valve seat seal portion 7t, the air in the internal space N does not leak from the outside air introduction port 7h.

Then, the pressure on the body portion of the outer layer body 3 is released and this begins to be restored, and when the internal space N becomes a decompressed state, the air valve body 6j is elastically deformed so as to bend downward, and the ring portion 6e becomes an annular wall 7j. On the other hand, it slides downward. In this state, since the communication passage is in a state of communicating from the outside air introduction port 7h to the ventilation port 3c as described above, the air taken in from the outside air introduction port 7h is introduced into the internal space N, and the inner layer 2 is introduced. The outer layer body 3 can be restored while the volume is reduced and deformed. Further, in this state, since the second convex portion 6m is in contact with the convex portion 7r of the annular wall 7q, the vibration of the air valve 6a can be suppressed. Therefore, even in the double container of the present embodiment, the noise of the air valve 6a can be effectively suppressed.

Although the dispensing cap for a double container and the double container according to the present invention have been described above with reference to specific embodiments, the present invention is not limited to such embodiments. For example, the ring portions 6e and 6k of the above-described embodiment are located on the radial outer side of the annular walls 7j and 7q, and the concave portions 7k and 7s and the convex portions 7r and 7m are provided on the outer peripheral surface portions of the annular walls 7j and 7q. However, the ring portions 6e and 6k may be positioned radially inside the annular walls 7j and 7q, and the concave portions 7k and 7s and the convex portions 7r and 7m may be located on the inner peripheral surfaces of the annular walls 7j and 7q. ..

Further, in the first embodiment shown in FIG. 1, a groove-shaped recess 7k is provided on the outer peripheral surface portion of the annular wall 7j, and the outer peripheral surface portion of the annular wall 7j located on both sides in the circumferential direction with respect to the concave portion 7k is a convex portion 7m. However, a portion protruding outward in the radial direction from the outer peripheral surface portion may be provided as a convex portion, and the outer peripheral surface portion of the annular wall 7j located on both sides in the circumferential direction with respect to the convex portion may be a concave portion. Further, also in the second embodiment shown in FIG. 3, groove-shaped recesses are provided on the outer peripheral surface portion of the annular wall 7q and are located on both sides in the circumferential direction with respect to the recesses, as in the modification of the first embodiment described above. The outer peripheral surface portion of the annular wall 7q may be a convex portion.

Further, a lubricant may be applied to a portion where the annular walls 7j and 7q and the ring portions 6e and 6k slide. As a result, the sliding resistance between the annular walls 7j and 7q and the ring portions 6e and 6k is reduced, so that the ring portions 6e and 6k can be smoothly moved with respect to the annular walls 7j and 7q as the air valve 6a is elastically deformed. It can be slid. There are many types of lubricants, but those suitable for the materials forming the check valve 6 and the cap body 7 may be selected.

Further, the valve seat seal portion 7t of the cap body 7 in the second embodiment may be provided inside the annular wall 7q in the radial direction, and the valve body seal portion 6n of the air valve 6a may be provided inside the ring portion 6k in the radial direction.

1: Container body 2: Inner layer 3: Outer layer 3a: Mouth 3b: Male thread 3c: Vent 3d: Notch 4: Dispensing cap 5: Inner plug 5a: Content communication port 5b: Cylindrical wall 5c : Intermediate wall 5d: Flange wall 5e: Lower annular wall 5f: Upper annular wall 5g: Communication opening 6: Check valve 6a: Air valve 6b: Outlet valve 6c: Base 6d: Air valve body 6e: Ring portion 6f: First Bi-convex part 6g: Outlet valve body 6h: Connecting piece 6j: Air valve body 6k: Ring part 6m: Second convex part 6n: Valve body sealing part 6p: Inclined part 7: Cap body 7a: Top wall 7b: Outer wall 7c: Female thread 7d: Outlet 7e: Outlet 7f: Support 7g: Swelling 7h: Outside air introduction port 7j: Circular wall 7k: Concave 7m: Convex 7n: Claw 7p: Non-concave peripheral surface (valve) Seat seal part)
7q: Circular wall 7r: Convex 7s: Concave 7t: Valve seat seal 8: Lid 8a: Top wall 8b: Lid outer wall 8c: Seal cylinder 8d: Engagement wall 8e: Hinge N: Internal space S: Filling Space g: Gap

Claims (6)

The outer layer body is attached to a container body having an inner layer body having a filling space for accommodating the contents and an outer layer body having a vent for partitioning the inner space between the inner layer body and the inner layer body. A double container pouring cap that pours out the contents of the filling space from the pouring outlet by pressing.
An outside air introduction port that covers the ventilation port and is attached to the outer layer body and leads to the ventilation port, an annular wall located in a path from the ventilation port to the outside air introduction port, and a circumferential surface portion of the annular wall. A cap body with adjacent recesses and protrusions,
Normally, it airtightly contacts the valve seat seal portion provided on the cap body to block the flow of air between the vent and the outside air introduction port, while elastically deforming when the internal space becomes decompressed. An air valve that is not in contact with the valve seat seal portion is provided.
The air valve is slidable with respect to the annular wall, and when the air valve is elastically deformed, the vent and the outside air are introduced between the air valve and the concave portion in a state of being in contact with the convex portion. A double container pouring cap with a ring that separates the gap through which the air flowing between the mouth and the mouth passes. The annular wall is a portion provided with the concave portion and the convex portion and a portion that functions as the valve seat seal portion without the concave portion and the convex portion along the direction in which the ring portion slides. Equipped with a non-concave peripheral surface
The double container according to claim 1, wherein the ring portion normally abuts on the non-concave and convex peripheral surface portion, while the ring portion abuts on the convex portion when the air valve is elastically deformed. Note cap. The cap body has the valve seat seal portion on the radial outer side or inner side of the annular wall.
The dispense cap for a double container according to claim 1, wherein the air valve has a valve body seal portion that abuts on the valve seat seal portion on the radial outer side or inner side of the ring portion. The double container pouring cap according to any one of claims 1 to 3, wherein the ring portion has a second convex portion that slidably contacts the convex portion. The pouring cap for a double container according to any one of claims 1 to 4, which has a lubricant at a portion where the annular wall and the ring portion abut. A double container composed of the container body and the dispensing cap for the double container according to any one of claims 1 to 5.

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